search for functional interface implementations by lambdas and method references: change signature/find usages; to be continued (IDEA-104286; IDEA-90824)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/changeSignature/MethodArgument.java

@@ -0,0 +1,11 @@
+interface SAM {
+  void <caret>foo();
+}
+
+class Test {
+  {
+    bar(() -> {});
+  }
+  
+  void bar(SAM sam){}
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/changeSignature/VariableDeclaration.java

@@ -0,0 +1,9 @@
+interface SAM {
+  void <caret>foo();
+}
+
+class Test {
+  {
+    SAM sam = () -> {};
+  }
+}